306 Proceedings of the Royal Physical Society. 



between Inclikeith and the Isle of May, 

 18 fathoms. Often brought to Newhaven 

 pier in the fishing boats. 

 Monstr. varicosum, with several persistent 

 outer lips, whitish, and large (6| inches 

 long). Newhaven Harbour, brought in by 

 the fishermen (if.). 



Fusns gracilis (Da Costa). 



Firth of Forth, 30 fathoms Qfetz. and Mey). 

 We have obtained it from the fishing boats 

 at Newhaven. Probably it is this species 

 which is referred to by M'Bain under the 

 name of Fusus islandicus. 



F. propinquus (Alder). 



Firth of Forth, 30 fathoms {Metz.and Mey); 

 off the Isle of May, 1854 {MB). 



F. jcfreysianus (Fischer). 



Firth of Forth, 30 fathoms {Metz. and Mey). 



Nassid^. 



Nassa reticulata (Linn.). 



Firth of Forth {MB). 



N. incrassata (Strom.). 



Firth of Forth {MB., and Ed. Mus). 



At Wardie it is commoner than the var. 



minor {M). 



This species is very common in the Firth. 



We have taken it in abundance at North 



Berwick, Wardie, Aberdour, etc. 



N. incrassata, var. minor. 



Living, and abundant, on the under side of 

 stones and crumbling rocks at North 

 Berwick, at very low water, and in roots 

 of tangle. This variety is commoner than 

 the species at North Berwick and Elie. 

 It is merely a dwarf form, with a fully 

 developed labial rib. Children at North 

 Berwick pierce them with needle and 

 thread, and call them necklace shells {M). 



